Visit Our UNIX and Linux User Community


[SHELL] Output formatting


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting [SHELL] Output formatting
# 8  
Old 09-20-2008
Quote:
Originally Posted by cfajohnson

In this case, it doesn't matter all that much, but it's an inefficient method. It uses cat (an external command, and therefore slow) unnecessarily, and causes extra work for the shell in splitting the output of cat into separate arguments.

However, if any of the lines contained spaces, it would also split the line and $i would be assigned each word separately.
Right, this much I follow, I guess what I'm asking is, in the example you gave, what is I? I understand why my way is ineffective, but I don't understand the syntax of your "while read..." command. I thought read was for reading from stdin? Maybe I'm misunderstanding the intent of the op's script...
# 9  
Old 09-20-2008
Quote:
Originally Posted by DeCoTwc
I thought read was for reading from stdin?

Yes, it is, but stdin can be redirected from a file or a pipe:

Code:
while IFS= read -r line
do
  : do something with "$line"
done < /path/to/file


Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

SQL Query in Shell Script output formatting

Hi All, #!/bin/ksh call_sql () { sql=$1 sqlplus -s $sqlparam_sieb <<EOF SET ECHO OFF; SET NEWPAGE NONE; SET SQLBL OFF; SET VERIFY OFF; SET LINESIZE 2000; SET... (2 Replies)
Discussion started by: Kevin Tivoli
2 Replies

2. Shell Programming and Scripting

Formatting output

I have the output like below: DEV#: 9 DEVICE NAME: hdisk9 TYPE: 1750500 ALGORITHM: Load Balance SERIAL: 68173531021 ========================================================================== Path# Adapter/Path Name State Mode Select Errors 0 ... (4 Replies)
Discussion started by: Daniel Gate
4 Replies

3. AIX

Help Formatting Output

I am using FORTRAN 90 on AIX 5.3 and need to output my data to a tab-delimited file. It must have actual tabs, and I cannot figure out a way to make it work. The resulting file will be imported into another application (quickbooks) as an .iif file....for some reason, it needs the tabs; spaces do... (2 Replies)
Discussion started by: KathyB148
2 Replies

4. Shell Programming and Scripting

Formatting Shell script output to Excel

I am facing a problem formatting the output of my shell script in excel. We are directing the output of the script to an excel sheet and need long integer type data printed in Excel as it is (i.e. not in the default scientific notation). Also, leading zeroes(if any) in the output are getting... (4 Replies)
Discussion started by: bornali.p
4 Replies

5. Shell Programming and Scripting

Formatting the output

Hi, I have a file which contents entries in this form. Only in /data4/temp abc.000001 Only in /data4/temp abc.000003 Only in /data4/temp abc.000012 Only in /data4/temp abc.000120 Only in /data4/temp abc.000133 Only in /data4/temp abc.001444 i want to read line by line and format... (2 Replies)
Discussion started by: arijitsaha
2 Replies

6. Shell Programming and Scripting

Problem in formatting output of SQL query in excel sheet in shell script

Hi Guys.. Need your help to format the output of my shell script. I am using spool command to take out put in csv file. below is my code. (for example) col USERNAME for a15 col EMAIL for a30 col FULL_NAME for a20 col LAST_LOGIN for a40 col DATE_CREATED for a40 SPOOL 120.csv... (3 Replies)
Discussion started by: Agupte
3 Replies

7. Shell Programming and Scripting

sql select command output formatting in shell script

Hi, I need to connect to the database and retrieve two variables from the database and store them in a variable,out of these two variables I need to get lastdigit appended to the variable 1 retrieved and variable 2 with out any modification in short select var,data from usage; o/p=... (1 Reply)
Discussion started by: rkrish
1 Replies

8. Shell Programming and Scripting

Formatting the query output using shell script

Hi All, I'm finding it difficult to format the query output that was returned in a shell script. Actually i have one shell script which does some DB stuff and depending on the result it will do some more tasks. My question here is to format the query output returned by mysql. Intitally my... (5 Replies)
Discussion started by: RSC1985
5 Replies

9. Shell Programming and Scripting

Output Formatting

Hi Guys I need help removing some lines from output i am receiving from a shell script. Here is the output: http://i52.tinypic.com/10z0fut.png I am trying to remove the output that i have circled. . ${EDW}/extracts/bin/extracts_setup2.sh . ${EDW}/extracts/extracts.conf ... (7 Replies)
Discussion started by: mooey1232003
7 Replies

10. Shell Programming and Scripting

formatting output

Hi need some advice.. #grep -i hostname test.csv (gives the below output) HOSTNAME,name,host_test,,,,,,,, Now I need to format the above output as below. HOSTNAME: name=host_test Any easy way of doing this using awk or sed or printf? (4 Replies)
Discussion started by: balaji_prk
4 Replies

Featured Tech Videos